This photograph of Mark Cavendish and Rob Hayles (from here) taking the piss illustrates perfectly the perception people have of fixed gear riders and the difference between a fixed gear bike and a ‘fixie’.
Firstly, the perception. This is a fairly dated look, like four years ago, jeez.
Secondly, the ‘fixie’. This word really isn’t used by people that are truly into riding fixed anymore, it hasn’t been for a a few years. It’s the same as someone who says “I’ve got an Apple Mac” instead of just “I’ve got a Mac”; you know straight away that they aren’t really into Macs. But the word ‘fixie’ has a second function now too, see above, that is a fixie, see below, that is a fixed gear. Two very different things.